Any losses are already losses and investments are already investments. They have been made to make a profit going forward and they have been for years now.
Surely these investors must know this. The Xbox division will be making more than ever when XB1 launches and they continue to sell the massively popular 360.
for the Xbox360, yes, but we haven't seen what will be written off in terms of development and other costs (exclusives) for the Xbox One, and as a brand, it's locked to consoles where both competing parties have branched into a platform.
Unless MS intends to replace GFWL with Xbox branding across the board for all MS gaming applications, the brand is.. feeble, to say the least. If the Xbone fails, the brand goes with it. Japan is probably already lost, with little hope of recovery. The Windows Phone and Windows 8 do not show much signs of significant Xbox branding / integration, mostly because Windows 8 is big bad dud.
I can see why investors are getting restless and the Xbox being a logical target.
I do think it will do more damage than good to ditch it now though. Certainly if MS want to have at least some angle at PC gaming and wider Xbox branding. If the division is ejected, that opportunity is lost for good and MS will not some other brand to do it, which is pretty ridiculous at this point, imo.